//: C11:Pmem2.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// Pointers to members
#include <iostream>
using namespace std;

class Widget
{
    void f(int) const {
        cout << "Widget::f()\n";
    }
    void g(int) const {
        cout << "Widget::g()\n";
    }
    void h(int) const {
        cout << "Widget::h()\n";
    }
    void i(int) const {
        cout << "Widget::i()\n";
    }
    static const int _count = 4;
    void (Widget::*fptr[_count])(int) const;
public:
    Widget() {
        fptr[0] = &Widget::f; // Full spec required
        fptr[1] = &Widget::g;
        fptr[2] = &Widget::h;
        fptr[3] = &Widget::i;
    }
    void select(int i, int j) {
        if (i < 0 || i >= _count) return;
        (this->*fptr[i])(j);
    }
    int count() {
        return _count;
    }
};

int main()
{
    Widget w;
    for (int i = 0; i < w.count(); i++)
        w.select(i, 47);
} ///:~
